package com.atguigu.eduservice.Listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

/**
 * @author wangxiangli
 * @create 2021-09-13-16:44
 */
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;
    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {

             if(subjectData==null){
                 throw new GuliException(20001,"文件数据为空");
             }

             //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
             //判断一级分类是否重复
        EduSubject existOneSubject=this.existOneSubject(subjectService,subjectData.getOneSubjectName());
             if(existOneSubject==null){//没有相同一级分类，进行添加
                 existOneSubject=new EduSubject();
                 existOneSubject.setParentId("0");
                 existOneSubject.setTitle(subjectData.getOneSubjectName());
                 subjectService.save(existOneSubject);
             }
             //获取一级分类id值
        String pid =existOneSubject.getId();
        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if(existTwoSubject == null) {
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());//二级分类名称
            subjectService.save(existTwoSubject);
        }

    }


    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
         QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
         wrapper.eq("title",name);
         wrapper.eq("parent_id","0");
         EduSubject oneSubject=subjectService.getOne(wrapper);
         return oneSubject;

    }
    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
